fiber optic 16 Flashcards Preview

2016 Master > fiber optic 16 > Flashcards

Flashcards in fiber optic 16 Deck (60)
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1

A method used to lock and mark one end of a line in order to allow someone to safely work on the other end.

Lockout tag-out

2

A card made up of material similar to photographic film that changes colors when exposed to light.

Photosensitive card

3

Visible light is generated at the following wavelengths

Between 390 nm and 780 nm

4

Allows only a single mode of light to propagate through the fiber core. This is the most common type of fiber used in telecommunications.

single-mode fiber

5

Allows many modes of light to propagate through the core. This type of fiber has a larger core and is used only for short distance data links. The bandwidth is limited due to light dispersion.

multi-mode fiber

6

The center of the fiber that carries the transmitted light.

core

7

The glass material surrounding the fiber core. This glass has a lower refractive index and reflects the light back into the core, thus maintaining the light level over a long distance.

cladding

8

The acrylic or plastic material applied over the optical fiber core and cladding. This material protects the glass and adds to its strength.

coating

9

The ratio of the velocity of light of two mediums of optical glass.

refractive index

10

A photo diode used to detect light from an optical fiber and convert the light to an electrical source.

pin diode

11

The difference between transmitted and received power resulting from the loss through equipment, lines, or other transmission devices; usually expressed in decibels.

attenuation

12

EDFA

erbium-doped fiber amplifier

13

YEDFA

Ytterbium Erbium-doped fiber amplifier

14

Fiber Loss at 1310nm

.35 dB/km

15

Fiber Loss at 1550nm

.25 dB/km

16

How many feet in a Kilometer

3,280 ft

17

Sum of all the losses associated with a fiber link between the optical fiber transmitter and the optical fiber receiver.

loss budget

18

Fusion Splice loss (typical)

0.1 dB

19

Mechanical Splice loss (typical)

0.25 dB

20

Connector Loss

0.5 dB average

21

Convert mW to dBm

dBm = 10log(mW)

22

Convert dBm to mW

mW = 10(dB/10)

23

A jumper cable for optical connections.

pigtail

24

A board for making optical connections consisting of sleeves used to line up two connectors.

patch panel

25

Fibers are contained in a plastic tube much larger than the optical fibers. The fibers can move freely within the

loose tube

26

Color-coded tubes that house and protect the optical fibers within a fiber optic cable.

buffer tube

27

consists of larger buffer tubes with the fibers inside, surrounded by fiberglass water block tape, armor, two steel strength members, and a jacket.

Unitube

28

fibers that are arranged side by side

Ribbon

29

the process by which two pieces of glass are physically melted together

Fusion splicing

30

inserting two pieces of glass into a plastic locking sleeve, carefully aligning the fibers, and locking the pieces of fiber together

Mechanical splicing

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